The Houston Astros needed starting pitcher help and they got it in dramatic fashion, picking up Zack Greinke from the Arizona Diamondbacks in return for pitchers J.B. Bukauskas and Corbin Martin, first baseman Seth Beer, and jack-of-all-trades Josh Rojas.
A couple of years ago, I became increasingly concerned about the continued decline in Zack Greinke’s velocity. It used to be that every spring training, Greinke would throw 86 mph and everyone would panic, and then the velocity would eventually come back. In 2018 that didn’t happen, yet Greinke’s shown every sign the last two seasons that he can navigate what could very well have been a late-career crisis, with the barest of speed bumps.
The major reason for Greinke’s survival is his multi-flavor curveball, a pitch he can throw anywhere from 66 to 74 mph and anywhere in the strike zone. The speed differences result in the pitch ranging from a traditional, looping curve to an almost full-on, Rip Sewell eephus pitch.
Just how good is his curveball? In 2017, by our pitch data, Greinke had his best-ever season with the curve, at 7.2 runs better than league average. Last year, that improved to +10.6 runs. This year, with a third of the season to go, Greinke stands at +16.4, second in baseball to Charlie Morton. At the pace he’s on, +24.6 by season’s end would put him fifth in the 18 years for which we have this data, behind only 2017 Corey Kluber, Morton, 2007 Erik Bedard, and 2003 Roy Halladay. Here is Greinke throwing his curve to Vladimir Guerrero Jr. on June 8:
Oh my.
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